Hi Murcho,
I have a theory...
When you run your game in the editor, do you get log info about updating acton data?
This happens when actions have changed since they were saved (e.g. parameters added or changed). The 1.1 update changed some old actions. However, in a deployed application, this data fixup is skipped - it is assumed that the saved action data is good. IOW, the project has been tested in the editor and saved.
Here's the wrinkle. Prefabs with old action data need to be "touched" to be set dirty and re-saved. E.g., open them in the playmaker editor, move a state a bit, and save... this will update the old action data. I'll fix this in the next update...
Can you try touching/re-saving the prefabs in your project to see if that fixes it?
You should be able to use the log to track down the prefabs that need updating...